Title :
Small-Signal Power Measuring Technique for Measuring the Frequency Response of Electroabsorption Modulators
Author :
Huang, H.P. ; Zhu, N.H. ; Hasen, Q.Q.G. ; Liu, Y. ; Wang, X. ; Pun, E.Y.B. ; Chung, P.S.
Author_Institution :
Inst. of Semicond., State Key Lab. on Integrated Optoelectronics, Beijing
Abstract :
We propose and demonstrate measurement of the frequency response of an electroabsorption (EA) modulator using an extended small-signal power measuring technique. In this technique, the modulator is driven by a microwave carrier amplitude modulated by a low-frequency signal, and the modulator frequency response is obtained without the need of a high-speed photodetector. Based upon the nonlinear characteristics of the EA modulator and the underlying principle of the present method, equations have been derived. A measurement scheme using a network analyzer and a low-speed photodetector has been proposed and constructed, and the experimental results confirm that our proposed method is as accurate as the swept-frequency measurement using a network analyzer directly
Keywords :
electro-optical modulation; electroabsorption; frequency measurement; network analysers; photodetectors; electroabsorption modulators; frequency response; low-frequency signal; low-speed photodetector; microwave carrier amplitude modulation; modulator frequency response; network analyzer; nonlinear characteristics; small-signal power measuring technique; swept-frequency measurement; Amplitude modulation; Frequency measurement; Frequency modulation; Frequency response; High speed optical techniques; Microwave theory and techniques; Nonlinear optics; Optical modulation; Power measurement; Q measurement; Electroabsorption (EA) modulator; frequency response; small-signal power measuring technique;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.886850
